LSMDBRequest.java

/*
 * Copyright (c) 2008, Jan Stender, Bjoern Kolbeck, Mikael Hoegqvist,
 *                     Felix Hupfeld, Zuse Institute Berlin
 * 
 * Licensed under the BSD License, see LICENSE file for details.
 * 
 */

package de.mxro.thrd.babudb05.lsmdb;

import de.mxro.thrd.babudb05.BabuDBRequestResultImpl;
import de.mxro.thrd.babudb05.api.database.UserDefinedLookup;
import de.mxro.thrd.babudb05.lsmdb.LSMDBWorker.RequestOperation;

/**
 * 
 * @author bjko
 * @param <T>
 */
public class LSMDBRequest<T> {
    
    private final BabuDBRequestResultImpl<T>    listener;
    
    private final LSMDatabase                   database;
    
    private final int                           indexId;
    
    private final RequestOperation              operation;
    
    private final InsertRecordGroup             insertData;
    
    private final byte[]                        lookupKey;
    
    private byte[]                              from;
    
    private byte[]                              to;
    
    private boolean                             ascending;
    
    private final UserDefinedLookup             udLookup;
    
    /**
     * Lock worker request.
     * 
     * @param listener
     */
    public LSMDBRequest(BabuDBRequestResultImpl<T> listener) {
        this.operation = RequestOperation.LOCK;
        this.listener = listener;
        this.udLookup = null;
        this.lookupKey = null;
        this.insertData = null;
        this.indexId = -1;
        this.database = null;
    }
    
    public LSMDBRequest(LSMDatabase database, BabuDBRequestResultImpl<T> listener, 
            InsertRecordGroup insert) {
        this.operation = RequestOperation.INSERT;
        this.database = database;
        this.indexId = 0;
        this.insertData = insert;
        this.lookupKey = null;
        this.listener = listener;
        this.udLookup = null;
    }
    
    public LSMDBRequest(LSMDatabase database, int indexId, 
            BabuDBRequestResultImpl<T> listener, byte[] key) {
        this.operation = RequestOperation.LOOKUP;
        this.database = database;
        this.indexId = indexId;
        this.lookupKey = key;
        this.insertData = null;
        this.listener = listener;
        this.udLookup = null;
    }
    
    public LSMDBRequest(LSMDatabase database, int indexId, 
            BabuDBRequestResultImpl<T> listener, byte[] prefix, 
            boolean ascending) {
        this.operation = RequestOperation.PREFIX_LOOKUP;
        this.database = database;
        this.indexId = indexId;
        this.lookupKey = prefix;
        this.insertData = null;
        this.listener = listener;
        this.udLookup = null;
        this.ascending = ascending;
    }
    
    public LSMDBRequest(LSMDatabase database, int indexId, 
            BabuDBRequestResultImpl<T> listener, byte[] from, byte[] to, 
            boolean ascending) {
        this.operation = RequestOperation.RANGE_LOOKUP;
        this.database = database;
        this.indexId = indexId;
        this.from = from;
        this.to = to;
        this.lookupKey = null;
        this.insertData = null;
        this.listener = listener;
        this.udLookup = null;
        this.ascending = ascending;
    }
    
    public LSMDBRequest(LSMDatabase database, 
            BabuDBRequestResultImpl<T> listener, UserDefinedLookup udLookup) {
        this.operation = RequestOperation.USER_DEFINED_LOOKUP;
        this.database = database;
        this.indexId = 0;
        this.lookupKey = null;
        this.insertData = null;
        this.listener = listener;
        this.udLookup = udLookup;
    }
    
    public LSMDatabase getDatabase() {
        return database;
    }
    
    public int getIndexId() {
        return indexId;
    }
    
    public RequestOperation getOperation() {
        return operation;
    }
    
    public InsertRecordGroup getInsertData() {
        return insertData;
    }
    
    public byte[] getLookupKey() {
        return lookupKey;
    }
    
    public byte[] getFrom() {
        return from;
    }
    
    public byte[] getTo() {
        return to;
    }
    
    public boolean isAscending() {
        return ascending;
    }
    
    public BabuDBRequestResultImpl<T> getListener() {
        return listener;
    }
    
    public UserDefinedLookup getUserDefinedLookup() {
        return this.udLookup;
    }
}